Art of weaving multiple-ply fabrics



UNITED STATES Pn'rnni @rrrca HARRY HARDlVICK, OF PHILADELPHIA, PENNSYLVANIA.

ART OF WEAVING MULTIPLE PLY FABRICS.

SPECIFICATION forming part of Letters Patent No. 359,862, dated March 22, 1887.

A nplication filed November 20, 1886. Serial No. 219,508.

To all whom it may concern.-

Be it known that I, HARRY Hannwrcn, a citizen of the United States, residing in Phila delphia, Pennsylvania, have invented certain Improvements in the Art of \Veaving MultiplePly Fabrics, of which the following isa specification.

My invention consists of a novel method of weaving multiple-ply fabricssuch, for instance, as two-ply ingrain carpet-the object of my invention being to provide a more acceptable distribution of colors in the pattern than is possible when the carpet is woven in the usual manner.

In weaving ordinary twopl y ingrain carpet, four sets of warp-t-hrcads and four weft'th reads are usually employed, two of said weft-threads forming the figure and the other two forming the ground, each of the figure-threads having as its mate one of the groundthrcads, and these threads being so arranged that when a figure-thread appears upon the face of the fabric its mate thread appears on the back, the figurethread appearing upon the back when the mate ground-thread appears upon the face. This result is necessitated in the usual manner of weaving two-ply ingrain carpets, owing to the manner in which the warpthreads are operated. There are four sets of warp-threads, two for the ground and two for the figure, and these threads are usually of the same colors as the weft-threads, each wei'tthread where it appears upon the face of the fabric being bound by a warpthread of its own color. There is in the loom for weaving the fabric a lifter-board for the ground-warps, a lifter-board for the figure warps, and a harness shaft or frame for each of the four warps, and there is but one operation of the Jacquard needles for every two picks of the loom, there being an operation of the ground and figure lifter-boards in succession between the operations of the Jacquard needles. Each Jacquard needle controls two tails, one connected to a figure-warp of one or more sets, and the other to the mate ground- I warp of said set or sets, and the lifter-boards are so constructed that when the figuring-tail of the needle is adjusted so as to be lifted by the figure lifter-board the ground-tail will (Specimens) not be acted on by the ground lifter-board when it rises. The weftthreads are inserted in a certain order, and this order is repeated indefinitely.

In my Patent No. 353,135, dated November 2-3, 1886, I have given a detailed statement of the operations of the loom necessary in weaving a piece of two ply ingraiu fabric in the usual manner, and this will make it clear that the ordinary method of working the warpthreads-necessitatcsthe disposal of the various threads in the manner which I have before mentioned.

In carrying out my invention I discard the alernate operation. of the Jacquard needles, and instead operate them on each pick of the loom, so that by a proper arrangement of the cards, and without interfering with the usual order of insertion of the weft -threads, the warps may be so operated as to permit the bringing of any desired weft-threads of the set side by side on the same face of the fabric. I employ the same loom as is now employed for wearing the fabric, the only change necessary being in the mechanism for operating the Jacquard cylinder and the use of double the number of cards formerly employed.

I do not here claim afabric produced in accordance with my invention, as thisforms the subject of my Patent No. 353,135, before re ferred to, but

I claim as my invention As an improvement in the art of weaving multiple-ply fabrics, the mode herein de scribed, which consists in controlling mate Warp-threads of ground and figure by one nee dle, introducing the wcl'tthreads in a certain order, operating the ground and figure lifterboards in succession, one for each pick, and operating the needles by the Jacquard cylinder before each pick, all substantially as specified.

In testimony whereof I have signed my name to thisspecification in the presence of two subscribing witnesses.

II A RRY II ARDWI CK.

\Vitnesses:

WILLIAM D. CONNiC-R. HA RRY SMITH. 

